Question

demonstrate an experiment to show the light is essential condition for plant to make their food
diagram please​

Answer 1

Answer:

• To prove the necessity of sunlight in photosynthesis following steps need to do:-

1. Take a plant with destarched leaf.
2. Leaf is partially covered with black paper on which a design is cut.
3. Expose this plant to sunlight for few hours and perform a starch test with iodine solution.

• Observation-

1. Covered leaf part shows brown colouration.
2. Exposed leaf shows blue-black colour.

• Result

1. Starch is present in the exposed leaf.

• Conclusion-

1. Leaf exposed to sunlight give iodine test, proving that sunlight is necessary for photosynthesis.

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Answer 2

Answer:

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Explanation:

Procedure: are

°°°°Take the potted plant and keep it in a dark place for 2-3 days so that the leaves get destarched.

°°°°Cover a part of one of its leaves with the strip of black paper. ...

°°°°°Now place this plant in sunlight for 3—4 hours

.

°°°°°°Pluck the selected covered leaf and remove the black paper covering it.